Question

question 1-8
which of the following is true for the element calcium (ca):
it forms covalent compounds.
it will accept/gain 6 electrons to have a full outer shell.
it will lose/donate 2 electrons to have a full outer shell.
it will accept/gain 2 electrons to have a full outer shell.

Explanation:

Calcium (Ca) is an alkaline earth metal with an atomic number of 20. Its electron configuration is \(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2\). To achieve a stable electron configuration (like a noble gas, with a full outer shell), it is easier for calcium to lose its 2 valence electrons in the 4s orbital rather than gain 6 electrons. Calcium typically forms ionic compounds (not covalent) by losing these 2 electrons to form a \(Ca^{2+}\) ion. So the correct statement is that it will lose/donate 2 electrons to have a full outer shell.

Answer:

It will lose/donate 2 electrons to have a full outer shell.